Command Repetition - Siemens SIMATIC RF650R Configuration Manual

Programming via SIMATIC controller
8.6 Programming the Ident profile
8.6.6

Command repetition

The Ident profile supports command repetition (Repeat command).
How it works
After restart (or "INIT") of the reader, you need to enable the presence mode using the
"INVENTORY" command with the attribute "0x86". Then transfer the command chain once
with the "EXECUTE" command. This command (or the last command or the command
chain) always remains buffered on the reader. If command repetition is started, the
temporarily stored command on the reader is executed again, and the result(s) transferred to
the Ident profile.
Make sure that the "EPC-ID/UID" of the commands to be repeated have the value 0. If the
EPC-ID as a different value, an error message is generated.
Effects of command repetition
● The data transfer on PROFIBUS/PROFINET is minimized. This reduction has a positive
effect particularly with extensive bus configurations and slow transmission speeds.
● The reader processes each transponder regardless of the Ident profile. This has a
particularly advantageous effect on gate applications since all transponders are always
identified with the full reader scan speed.
● Total data throughput is increased considerably particularly with controllers that have few
system resources for acyclic frames.
Overview of the commands
Table 8- 36
Command
PHYSICAL-READ
PHYSICAL-WRITE
INVENTORY
KILL-TAG
LOCK-TAG-BANK
148
Overview of the commands with which command repetition is possible
Command code
HEX ASCII
70 'p'
71 'q'
69 'i'
6A 'j'
79 'y'
Description
Reads data from a transponder by specifying the
physical start address of the memory bank (UHF), the
length and the password.
Writes data to a transponder by specifying the physi-
cal start address of the memory bank (UHF), the
length and the password.
Requests a list of all currently accessible transpond-
ers within the antenna range.
RF680R/RF685R:
The transponder is permanently deactivated.
RF680R/RF685R:
Defines a password for transponder access.
SIMATIC RF650R/RF680R/RF685R
Configuration Manual, 03/2018, C79000-G8976-C386-06